Mercedes KE Jetronic EHA Valve comprehensive tutorial, a look at Jordan’s ISCV & Äffle und Pfärdle

[@r3FMusic]

Many thanks for the detailed explanation. I'll have to watch the video again...

[@carsandengineering2022]

Peter, you always provide great information and explain it in the perfect amount of detail. Thanks for the mention!

[@brittanywright9646]

I recently had an issue where my car ran horribly once it warmed up or after the first few minutes of starting. Car would die on acceleration, my mpg plummeted down to about 13 mpg. I ran nearly every test in section 07-0121 for KE as that's what I narrowed it down to. Finally, I unplugged the eha and everything went back to normal. So I then ran the tests steps from 10.0 regarding the eha and everything tested fine. I watch this video and emphasis was put on the polarity of the wiring. I then thought back and remembered I replaced the crumbling connector shortly before the issue occurred, but I replaced several connectors and resoldered fraying terminal pins. I went back out and saw that I indeed had the # 1 and # 1 wires in the incorrect spots. I literally systematically took the whole KE unit apart, swapped out O2 sensors, ECUs, bought a new rubber airflow boot at the fd, re-centered the air deflection plate, replaced the cold start valve, etc, and all I had to do was swap those 2 wires back. Thank you so much! I just put the car back together, and readjusted the air-fuel mixture now everything is back to normal.

[@inovahightechltd]

@brittanywright9646 thank you for your comment! Glad the video was of help to you! Peter

[@greggschuder7478]

Damn. Impressed.

[@ronanconnolly2196]

Brilliant.

[@BigFish246]

Peter, can you please link to Jordan's page for converting KE Jet to Pulse Injectors. I searched, but couldn't find it.

[@inovahightechltd]

It’s in the description of this video

[@007sg2]

Hello I have a question about the EHA. Fuel was leaking from a small hole in the top of the exterior, not from the O-ring part of the EHA, so I sealed the hole. Will sealing the hole cause any problems?

[@inovahightechltd]

This means the internal seal of the EHA is defective and the EHA will no longer work correctly

[@sas8403]

hi little off topic how do I check my KE jetronic ecu is actually working, I need to see if pin 4 on the ecu is giving any output fuelling signal and not sure how to check

[@inovahightechltd]

@@sas8403 TD signal and coil primary side kzbin.info/www/bejne/e5Swi3aVqax-faMsi=cyS6b73HOviiEJTp

[@r3FMusic]

I couldn't get the KJ-stop module to work in my vehicle. All the link is correct but I failed. Do you think it's okay to have the 1989 M102.963 KJ-Stop module? Although the relay components are correct, it tries to burn LPG and Gasoline at the same time. I tried 2 EHAs during the test phase, but my guess is that the EHA cannot agree with the Kj-stop and the EHA does not cut the gas. My links are correct.

[@RockerCPH]

Thank you for this detailed explanation of the EHA. I have odd readings when I test mine. EHA measured resistance is 19.7 OHM - seems ok. Ignition on: 74 MA - seems ok. Engine start/idle: 10 MA. 9-8-7-6-5-4-3-2-1-0 MA gradually readings within 30 seconds. Then goes back up to 4-5 MA and stays. Acceleration/Revving to 2500-3000 RPM: 0 MA. Then goes to 4-5 MA. Deceleration/letting off the gas from 2500-3000 RPM: 0 MA. Then goes to 4-5 MA. All other sensor have essentially been replaced on this 1990 560 SEL. All vacuum lines, fuel and most ignition parts are replaced. The car runs flawlessly and accelerates great. Only issue is hard warm start and slight fluttering idle. I am not sure how to troubleshoot this. Replace the EHA, look in to the ECU or other? Thank you! - Kristian

[@inovahightechltd]

You need to check your fuel pressure as per manual. If fuel pressure drops to fast after shutting warm engine off, then you have either a fuel line leak or your accumulator is broke and results in vapor locking

[@RockerCPH]

@@inovahightechltd Thank you for replying. A new accumulator was installed recently and the fuel system keeps pressure after the engine is shut off. The EHA has not been changed by me, but appears to be okay. I do have the 0.4 bar pressure difference between lower and upper FD chamber. I will however check these things again. I tested my mass airflow potentiometer and do see this having inconsistent readings. I will replace this. Could this potentiometer cause odd signals to the EHA?

[@inovahightechltd]

The EHA when off (0V) supplies the richest mixture. This could be a vacuum leak in the intake system which exists only when engine is warm due to expansion of parts from heat, Have someone start the car when engine is warm and watch on how far the airflow plate is going to be moved down by engine vacuum. If the plate hardly moves because of a lack of vacuum, then you won’t have any fuel flow into the injectors from FD and the engine won’t start. Peter

[@loaialtmiimi4426]

Exactly how many winds the weight of Mercedes the 560

[@iwannabentley]

If I plug in my connector to the EHA valve the cuts straight out and won't start or run until I disconnect it! Any ideas? Car has been stood for years

[@inovahightechltd]

You need to very carefully readjust the plate rest position and then tweak the mixture control. I made several videos which are published here on my channel

[@brianalcock]

Hi I have a W124 M103 engine with no O2 Sensor. Could I ask, does the EHA measure fuel pressure or fuel mixture. I have a fluttering idle problem. The engine rests at about 500 rpm and has a slight shutter on Idle. I have a fuel pressure of 5 Bars with valve closed and 5.4 Bars with it open. So I don't wish to interfer with pressure. I've a new Bosch HT system and replaced all injectors. I conducted tests on most parts including Fuel Pump, fuel pressure regulator, Accumulator, ICV and Vac lines. Any advice is much appreciated. Cheers

[@inovahightechltd]

How many miles on the engine? Have you checked and adjusted valve timing with offset woodruff keys etc?

[@brianalcock]

I have done nothing yet with the internal part of the engine except compression test which is fine in all cylinders.

[@inovahightechltd]

@@brianalcock if you have fixed / checked everything externally then you may want to proceed to the internals, like chain, chain tensioner, sprocket wear, camshaft and valve wear, carbon deposits and verify that camshaft timing is 100% correct

[@brianalcock]

Does the EHA regulate fuel mixture or fuel pressure? Also, I have seen tests for measuring resistance on the potentiometer but how do you measure voltage. Thanks in advance

[@inovahightechltd]

Fuel mixture through varying internal fuel pressure in FD

[@farmanashrafov4068]

Hello, I have EHA 6.58 mm CO 45-55% (between 6.5 volts) EHA 20 ohms, fuel cut-off is 68 mA, it fluctuates around +8 and +9 mA at idle. 02 when disconnecting the sensor, +5 and + 6 mA fluctuates. 02 sensor fluctuates between 0.3 and 0.7 volts. How do I make +8 +9 mA -3 and +3 please help me thank you

[@inovahightechltd]

What is your idle rpm?

[@farmanashrafov4068]

@@inovahightechltd 750

[@farmanashrafov4068]

W201 102 engine 1.8 otomotic

[@inovahightechltd]

@@farmanashrafov4068 I have to check the specific data for your engine. The values stated in the video are for 117.96x engines I will post my findings in the next 2 to 3 days Thanks for watching my videos Peter

[@mercedeske]

Schöna Dag ond bis zom nächschde Mal!

[@LuxyHedo68]

an gud nuescht aus Letzebuerg!

[@srsr4882]

Thank you so mucth Sir.. In my country.. They make replacing depend on guess and expereince.. this is crazy and stupid method coast us too much money and always not suitable result to reach to an solution to the problem..